That happened because in some moment the application was started by root. Then all the files ( logs ) and new files added in the repository are created and updated by the user who started the application. Usually happens when started the application from the terminal with ./bin/catalina.sh or ./bin/...

If you updated the column active to "T" in the OKM_USERS TABLE should not be any reason why you are not able to login, if this is the only think you have changed. Default okmAdmin password in database is "21232f297a57a5a743894a0e4a801fc3" what seems is your case, ensure you do not have extra spaces ...

You have "Java version: 11.0.4" and you need "OpenJDK 1.8", the reason is without this version the tomcat what is installed with OpenKM will not work. Until the installer will detect this java version the installer not advance in the following steps.